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    <id>26784</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>4726</pageFirst>
    <pageLast>4740</pageLast>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>65</volume>
    <type>articler</type>
    <publisherName/>
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    <completedDate>2021-01-20</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A Tool for Analysis of Existence of Equilibria and Voltage Stability in Power Systems with Constant Power Loads</title>
    <abstract language="eng">It is well known that constant power loads in power systems have a destabilizing effect. Their growing presence in modern installations significantly aggravates this issue, hence, motivating the development of new methods to analyze their effect in ac and dc power systems. Formally, this problem can be cast as the analysis of solutions of a set of nonlinear algebraic equations of the form f(x) = 0, where f : R n → R n , to which we associate the differential equation x = f(x). By invoking advanced concepts of dynamical systems theory and effectively exploiting its monotonicity, the following properties are established: First, prove that, if there are equilibria, there is a distinguished one that is stable and attractive, and give conditions such that it is unique. Second, give a simple online procedure to decide whether equilibria exist or not and to compute the distinguished one. Third, prove that the method is also applicable for the case when the parameters of the system are not exactly known. It is shown how the proposed tool can be applied to the analysis of long-term voltage stability in ac power systems, and to the study of existence of equilibria of multiterminal high-voltage dc systems and dc microgrids.</abstract>
    <parentTitle language="eng">IEEE Transactions on Automatic Control</parentTitle>
    <identifier type="doi">10.1109/TAC.2020.2965028</identifier>
    <identifier type="issn">0018-9286</identifier>
    <identifier type="issn">1558-2523</identifier>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <author>
      <firstName>Alexey S.</firstName>
      <lastName>Matveev</lastName>
    </author>
    <submitter>
      <firstName>Tino</firstName>
      <lastName>Fischer</lastName>
    </submitter>
    <author>
      <firstName>Juan Eduardo</firstName>
      <lastName>Machado</lastName>
    </author>
    <author>
      <firstName>Romeo</firstName>
      <lastName>Ortega</lastName>
    </author>
    <author>
      <firstName>Johannes</firstName>
      <lastName>Schiffer</lastName>
    </author>
    <author>
      <firstName>Anton</firstName>
      <lastName>Pyrkin</lastName>
    </author>
    <collection role="institutes" number="3206">FG Regelungssysteme und Netzleittechnik</collection>
  </doc>
  <doc>
    <id>26793</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>6</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject_ref</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
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    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-01-20</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A Passivity-Inspired Design of Power-Voltage Droop for DC Microgrids with Electrical Network Dynamics</title>
    <abstract language="eng">We propose a design procedure for a power-voltage droop controller in structure-preserving DC microgrids under explicit consideration of the electrical network dynamics. Differently from most related literature, the system’s controlled output is taken as the power—not the current—injection at each generation unit, yielding a nonlinear closed-loop system. This makes the output regulation problem non-trivial, yet far more appealing in a practical setting than the usual linear current-voltage droop control. Our approach is inspired by passivity-based control design in the sense that we exploit the natural port-Hamiltonian representation of the system dynamics and its associated shifted Hamiltonian to derive a control law together with sufficient conditions on the tuning gains that guarantee global asymptotic stability. The analysis is illustrated via detailed simulations, where accurate power sharing is manifested among the distributed generation units in the presence of load variations.</abstract>
    <parentTitle language="eng">59th IEEE Conference on Decision and Control (CDC), Jeju Island, Republic of Korea, Dec. 14-18, 2020</parentTitle>
    <identifier type="url">https://www-docs.b-tu.de/fg-regelungssysteme/public/Publications/2020%20A%20Passivity-Inspired%20Design%20of%20Power-Voltage%20Droop%20for%20DC%20Microgrids%20with%20Electrical%20Network%20Dynamics.pdf</identifier>
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    <enrichment key="opus.source">publish</enrichment>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <author>
      <firstName>Juan Eduardo</firstName>
      <lastName>Machado</lastName>
    </author>
    <submitter>
      <firstName>Tino</firstName>
      <lastName>Fischer</lastName>
    </submitter>
    <author>
      <firstName>Johannes</firstName>
      <lastName>Schiffer</lastName>
    </author>
    <collection role="institutes" number="3206">FG Regelungssysteme und Netzleittechnik</collection>
  </doc>
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